Last week, the best-performing media release of the year was revealed. It wasn'tSpectre, Adele's new album or tickets for U2's latest global tour. It wasFallout 4, a game from Bethesda Game Studios, which made $750m (497.6m) in a single day of sales.

One of the biggest industries you may not yet have heard of, eSports is a lucrative market. Video gaming has morphed from being a solitary pursuit of teenagers in their bedrooms to the focus of roaring crowds at sold-out arenas.